diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/default.nix | 2 | ||||
| -rw-r--r-- | lib/lists.nix | 13 | ||||
| -rw-r--r-- | lib/options.nix | 2 |
3 files changed, 15 insertions, 2 deletions
diff --git a/lib/default.nix b/lib/default.nix index 3efaaf0f8f9e..18d2dfae1e18 100644 --- a/lib/default.nix +++ b/lib/default.nix @@ -71,7 +71,7 @@ let zipAttrsWithNames zipAttrsWith zipAttrs recursiveUpdateUntil recursiveUpdate matchAttrs overrideExisting getOutput getBin getLib getDev chooseDevOutputs zipWithNames zip; - inherit (lists) singleton foldr fold foldl foldl' imap0 imap1 + inherit (lists) singleton forEach foldr fold foldl foldl' imap0 imap1 concatMap flatten remove findSingle findFirst any all count optional optionals toList range partition zipListsWith zipLists reverseList listDfs toposort sort naturalSort compareLists take diff --git a/lib/lists.nix b/lib/lists.nix index 93a554f24f84..d075a02d4755 100644 --- a/lib/lists.nix +++ b/lib/lists.nix @@ -21,6 +21,19 @@ rec { */ singleton = x: [x]; + /* Apply the function to each element in the list. Same as `map`, but arguments + flipped. + + Type: forEach :: [a] -> (a -> b) -> [b] + + Example: + forEach [ 1 2 ] (x: + toString x + ) + => [ "1" "2" ] + */ + forEach = xs: f: map f xs; + /* “right fold” a binary function `op` between successive elements of `list` with `nul' as the starting value, i.e., `foldr op nul [x_1 x_2 ... x_n] == op x_1 (op x_2 ... (op x_n nul))`. diff --git a/lib/options.nix b/lib/options.nix index d2eae3ae3a98..e5c0631a5437 100644 --- a/lib/options.nix +++ b/lib/options.nix @@ -36,7 +36,7 @@ rec { example ? null, # String describing the option. description ? null, - # Related packages used in the manual (see `genRelatedPackages` in ../nixos/doc/manual/default.nix). + # Related packages used in the manual (see `genRelatedPackages` in ../nixos/lib/make-options-doc/default.nix). relatedPackages ? null, # Option type, providing type-checking and value merging. type ? null, |